JPH0434165U

JPH0434165U -

Info

Publication number: JPH0434165U
Application number: JP7734990U
Authority: JP
Priority date: 1990-07-20
Filing date: 1990-07-20
Publication date: 1992-03-19
Anticipated expiration: 2005-07-20
Also published as: JP2504951Y2

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す断面図、第２
図は第１図の−線に沿う要部の断面図、第３
図は第１図の−線に沿う断面図である。１……シエル、６……バルブボデイ、１１……
弁プランジヤ、１７……変圧通路、１７ａ……第
１半径方向通路、１７ｂ……第２半径方向通路、
１７ｃ……第３半径方向通路、２１……入力軸、
２７……シール部材、２８……ベアリング、３２
……キー部材。 Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is a sectional view of the main part along the - line in Figure 1,
The figure is a sectional view taken along the - line in FIG. 1. 1... Ciel, 6... Valve body, 11...
Valve plunger, 17... variable pressure passage, 17a... first radial passage, 17b... second radial passage,
17c...Third radial passage, 21...Input shaft,
27... Seal member, 28... Bearing, 32
...Key parts.

Claims

[Scope of claim for utility model registration] A valve body slidably provided within the shell,
a valve plunger that is slidably provided on the valve body and that is interlocked with the input shaft and that constitutes a part of the valve mechanism; a variable pressure passage that is provided on the valve body that introduces pressure fluid from the valve mechanism into the variable pressure chamber; , further comprising a key member that engages with the valve plunger, and the pressure changing passage is connected to a first radial passage formed in the radial direction of the valve body and a rear side of the first radial passage, and the pressure changing passage is connected to a rear side of the first radial passage, and a second radial passage having a width narrower than the circumferential width of the first radial passage with reference to the circumferential direction of the key member, and the key member is inserted into the first radial passage. In the brake booster, the brake booster has a width larger than the circumferential width of the second radial passage and is movable forward and backward in the axial direction of the valve body within the first radial passage. A third radial passage constituting the pressure-changing passage is formed in series with the front side of the first radial passage, and the circumferential width of the third radial passage is set smaller than the width of the key member in the same direction. A brake booster characterized by: